73 Amateur Radio Today – September 1961 Issue
Issue Contents:
Silicon Rectifiers
– How not to pop ’em a lesson for hams and engineers alike …… W1OOP 6
Tuning Bypass Condensers
– How to make a bypass bypass at the VHF’s …… K5JKX/6 8
Simplescope
– Perchance the title may give this one away. You need one. Build it …… W0OPA 10
VFO Chirp vs. 6AU6
– Several VFO’s use a 6AU6. Lousy choice try a 6AH6 instead and see …… K3KMO 20
Console
– If you’re going to be obstinate enough not to buy an Alden Hambench then build this …… W9HKA 22
Class B Modulators
– We’ll print anything …… WA2INM 28
Eye for Resonance
– How confounded simple can a GDO get? This is how simple that’s how …… K6EAW 30
Break-in A la Transwitch
– Complete station control unit transistorized …… W7AXJ 33
Environmental Testing
– Be nice to surplus gear it has been through a lot …… W2WYM 36
Band Edge Marker
– A 3.5 MHz crystal calibrates your receiver on all ham bands …… WA2HZR 37
Tell The World
– Ham radio needs publicity here’s how to go about it …… K5JKX/6 39
Zero Shift Keying
– A new idea presented first in 73. You’ll be hearing more about this …… K5JKX/6 42
Cross-polarized Beam
– A new approach to diversity transmission and reception …… K6CT 48
Crystal Oscillators
– This is the Big Technical article. You’ll find interesting …… Staff 50
Propagation Charts
…… K2IGY 64
Why a 73 Page Magazine Is Impossible
– or: further developments of the kW Transistor Transmitter …… K2PMM 72
73 Amateur Radio Today – September 1961 Issue
